SilverStone Strider Titanium ST80F-TI PSU Review

Efficiency, Temperature And Noise

Efficiency

Our efficiency testing procedure is detailed here.

Using the results from the previous page, we plotted a chart showing the ST80F-TI efficiency at low loads, and loads from 10 to 110 percent of its maximum-rated capacity.

The overall efficiency under normal loads is very high, though SilverStone cannot match the efficiency of EVGA's 850 T2. Then again, the Titanium-rated EVGA offering also costs a lot more. At lower loads, the situation flips and SilverStone's ST80F-TI beats the 850 T2 by almost 1%.

Efficiency At Low Loads

In the following tests, we measure the ST80F-TI's efficiency at loads significantly lower than 10 percent of its maximum capacity (the lowest load the 80 PLUS standard measures). The loads we dialed were 20, 40, 60 and 80W. This is important for representing when a PC is idle, with power-saving features turned on.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed
Fan Noise
PF/AC Volts
11.231A0.492A0.474A0.200A19.6374.61%705 RPM
26.0 dB(A)
0.821
11.840V5.002V3.363V4.994V26.31115.1V
22.489A0.998A0.980A0.400A39.7484.86%705 RPM
26.0 dB(A)0.889
11.839V4.998V3.362V4.986V46.83115.1V
33.748A1.497A1.485A4.980A59.8588.83%705 RPM
26.0 dB(A)0.926
11.846V4.994V3.361V4.980V67.38115.1V
44.997A2.004A1.961A0.800A79.7791.80%705 RPM
26.0 dB(A)0.940
11.845V4.993V3.361V4.973V86.90115.1V

Under light loads, the ST80F-TI is highly efficient. It even beats the similar-capacity, high-end Super Flower designs. In addition, noise output is kept at very low levels since the fan rotates at its minimum speed.

5VSB Efficiency

The ATX specification states that 5VSB standby supply efficiency should be as high as possible, recommending 50 percent or higher with 100mA of load, 60 percent or higher with 250mA of load and 70 percent or higher with 1A or more of load.

We will take four measurements: one each at 100, 250 and 1000mA, and one with the full load the 5VSB rail can handle. 

Test #5VSBDC/AC (Watts)EfficiencyPF/AC Volts
10.102A0.5071.43%0.046
4.938V0.70115.1V
20.251A1.2473.37%0.107
4.934V1.69115.1V
31.002A4.9282.83%0.274
4.912V5.94115.1V
42.501A12.1881.25%0.386
4.870V14.99115.1V

The 5VSB rail achieves good efficiency levels, though they're not the highest we've ever seen on this rail.

Power Consumption In Idle And Standby

In the table below, you'll find the power consumption and voltage values of all rails (except -12V) when the PSU is idle (powered on, but without any load on its rails), and the power consumption when the PSU is in standby mode (without any load, at 5VSB).

Mode12V5V3.3V5VSBWattsPF/AC Volts
Idle11.851V5.007V3.365V5.008V5.730.348
115.1V
Standby0.060.004
115.1V

The PSU needs very little energy in standby, with both input voltages.

Fan RPM, Delta Temperature And Output Noise

Our mixed noise testing is described in detail here.

The first chart below illustrates the cooling fan's speed (in RPM), and the delta between input and output temperature. The results were obtained at 35 °C (95 °F) to 47 °C (116.6 °F) ambient temperature.   

The next chart shows the cooling fan's speed (again, in RPM) and output noise. We measured acoustics from one meter away inside of a small, custom-made anechoic chamber with internals completely covered in sound-proofing material (be quiet! Noise Absorber kit). Background noise inside the chamber was below 18 dB(A) during testing, and the results were obtained with the PSU operating at 35 °C (95 °F) to 47 °C (116.6 °F) ambient temperature. 

The following graph illustrates the fan's output noise over the PSU's operating range. The same conditions of the above graph apply to our measurements, though the ambient temperature was between at 28 °C (82.4 °F) to 30 °C (86 °F).  

Under normal ambient temperatures, noise output is low thanks to the high efficiency levels that minimize energy losses, especially under light and moderate loads. Despite the use of a smaller, 120mm fan, lower thermal loads don't necessitate increased airflow. As a result, there's no need for an aggressive fan profile. When ambient temperatures crest 40 °C, however, the situation changes. 

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4 comments
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  • JQB45
    Tier-3 and I think I am being generous. I never thought I would see a Titanium rated unit with such poor performance. I base my decision on the 12V ripple and hold up time.
  • gdmaclew
    I'm not surprised that silverstone opted not to supply an on-off switch. In fact, I can see no reason why this brand keeps getting the high ratings it enjoys.
    I bought one 3 years ago to replace a defective PC Power and cooling PSU.
    the Silverstone 80 Plus gold (Strider S series) lasted just 9 months before it started to produce erratic voltage levels. Sent back for a replacement and that one lasted 15 months. I now have that unit's replacement but it is now a spare to my Corsir RX750.
    At least they honored their warranty...twice.
  • maxwellmelon
    http://silverstonetek.com/product.php?pid=648&area=en

    they say ripple on 12 volt spec is 120mv so they don't even say themselves that its going to have a ripple under 100 which the writer of this article was expecting. why expect something that the manufacture of this psu didn't say it would do
  • Andi lim
    Too little Elco and Solid Capacitors on secondary side cause poor ripple and hol up time. Must set new standart, Platinum and Titanium Level should not exceed 50mV on all output rail.